WEEK 6 : 24TH FEBRUARY 2012

Title : Do some research and explore more about the Water                   Level Sensor.

Objective : To study about the Water Level Sensor.

           

Contents / Procedures : Search about the Water Level                                                            Sensor principle and its applications.

                  

Results / Analysis : 

1) The principle

     A low AC voltage is applied between the probe electrode and      the tank wall (or reference electrode in case of insulated tank).      When the water/liquid comes in contact with the electrode tip,        a conductive path is established between the sense electrode      and the tank wall/reference electrode. This current is sensed,        amplified and made to operate a relay whose contacts in turn        can be used for annunciation/control.

2) Applications

    The Water Level Sensor is to maintain a constant water level         avoiding material wastage in your process plant. Common             applications also include switching pumps on and off to avoid       overflow, dry running and indicating water level in an empty           tank to avoid wear and tear and production stoppage.

Conclusion: From the research, the Water Level Sensor, can be                        use to indicate the level of the water when                                        it is nearly empty.